<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片 -->
    <el-card>
      <!-- 添加用户 -->
      <el-button type="primary">添加角色</el-button>
      <el-table :data="rolelist" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套2级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id" 
                >
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级 -->
                  <el-col>
                    <el-tag   :span="18"
                    v-for="(item3, i3) in item2.children"
                    :key="item3.id" type="warning" closable @close="removeRightById(scope.row,item3.id)">{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)"
              >分配角色</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setrolesdialogVisible"
      width="50%"  @close="setrolesdialogClose">
      <!-- 文字 -->
      <el-tree :data="rightlist" :props="trssprops" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <!-- 底部 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setrolesdialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolelist: [],
      // 控制分配权限的显示和颖仓
      setrolesdialogVisible : false,
      // 所有权限列表的数据
      rightlist:[],
      // 树形控件的绑定对象
      trssprops:{
        label:'authName',
        children:'children'
      },
      // 默认选中的节点id 值
      defKeys:[],
      // 当前即将分配的角色id
      roleId:''
    };
  },
  created() {
    this.getRoleList();
  },
  mounted() {},
  methods: {
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色信息失败");
      }
      this.$message.success("获取角色信息成功");
      this.rolelist = res.data;
    },
    // 根据id删除对应的权限
    async removeRightById(role,rightId) {
      // 弹框提示用户是否要删除
     const folfing = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(folfing !== 'confirm') {
          return this.$message.info('取消了删除')
        }
        // alert('确认了删除');

        // 发送请求
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !== 200) {
          return this.$message.error('删除对应权限失败')
        }
        this.$message.success('删除对应权限成功')
        this.getRoleList()

    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取分配权限的所有数据
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status !== 200) {
        return this.$message.error('获取权限列表数据失败')
      }
      this.$message.success('获取权限列表数据成功')
      // 把获取到的数据保存到data中
      this.rightlist = res.data
      // 递归获取三级权限的id
      this.getleafKeys(role,this.defKeys)
      // 控制弹出框显示
      this.setrolesdialogVisible = true
    },
    // 通过递归的方式，获取所有角色三级权限的id，并保存到defKeys 数组中
    getleafKeys(node,arr) {
      // 如果当前node 没有孩子  就证明是三级
      if(!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getleafKeys(item,arr))
    },
    // 监听分配权限对话框的关闭事件
    setrolesdialogClose() {
      this.defKeys = []
    },
    // 点击确定分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys);
      const idStr = keys.join(",")

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{
        rids:idStr
      })

      if(res.meta.status !== 200) {
        return this.$message.error('更新权限失败')
      }
      this.$message.success('更新权限成功')

      // 重新渲染页面
      this.getRoleList()
      // 关闭弹框
      this.setrolesdialogVisible = false
    }
  },
};
</script>

<style scoped lang="less">
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #ccc;
}
.bdbottom {
  border-bottom: 1px solid #ccc;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
